Coiling wire around an iron core and applying an electric current through the wire creates a temporary magnet called an electromagnet. what would increase the strength of an electromagnet? a) use a smaller nail. b) use a battery with less voltage. c) use a battery with more voltage. d) use fewer coils of wire around the nail.

C) Use a battery with more voltage.

Explanation:

The equation for the magnetic field around a coil is given by,

B = μ₀NI

where,

B = Magnetic flux density

μ₀ = permeability

N = number of turns per meter

I = Current in the wire

So when using a higher voltage battery, more current passes through the battery as resistance of the wire remains the same.

explanation:

specific heat is the amount of heat required to raise the temperature of a unit mass of a substance.

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation: